.@{theme} {
  .back-btn{
    background-color: @back-bg;
    height: 30px;
    line-height: 30px;
    width: 83px;
    text-align: center;
    position: absolute;
    right: 0;
    top: 10px;
    border-radius: 2px;
    color: @font-color-white;
    cursor: pointer;
  }
}